Algorithm::NestedLoops is a more general effort, whereas Math::Combinatorics is focused specifically on generating combinations and permutations - I would expect it to derive some performance from that specialisation, especially in the case of combinations which are a bit more difficult to iterate with their need to treat e.g. aab and aba as duplicate.
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^M Free your mind!

In reply to Re: Efficient Unique Nested Combinations by Moron
in thread Efficient Unique Nested Combinations by FFRANK

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